CN101698602A - Preparation method of yttria-base transparent ceramics with designable component and structure - Google Patents
Preparation method of yttria-base transparent ceramics with designable component and structure Download PDFInfo
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Abstract
The invention belongs to the field of ceramics preparation, in particular to a preparation method of yttria-base transparent ceramics with designable component and structure. The invention uses the method of tape casting to prepare yttria-base ceramic powder doped with laser ions into a cast film; the cast film with different components is laminated to prepare a ceramic biscuit with complex shape and special component and performance by designing the component and structure; after the biscuit unsticks, biscuit density and uniformity are obviously superior to a sample shaped by dry pressing after cold isostatic pressing again. The sintering method of the invention can obtain transparent ceramics with higher performance if compared with the prior art.
Description
Technical field
The invention belongs to forming process of ceramics and design preparation field, be specifically related to the preparation method of the programmable yttria-base transparent ceramics of a kind of The Nomenclature Composition and Structure of Complexes.
Background technology
Crystalline ceramics had both had the light transmission as glass, had excellent properties such as high temperature resistant, corrosion-resistant, high-strength ℃ of pottery itself again.All have wide application prospects at aspect crystalline ceramics such as the energy, medical imaging, laser weapon, explorations.The high-performance crystalline ceramics is the important front edge direction of present material area research and application.Yttria-base transparent ceramics is one of typical case's representative in crystalline ceramics field.
Crystalline ceramics mainly adopts dry-pressing in conjunction with the moulding of isostatic cool pressing method at present.As the Chinese patent 03129618.3 of application such as Chen Jiyang etc., the report that the part injection forming is also arranged is as [Laura Esposito and Andreana Piancastelli, " Role ofpowder properties and shaping technique on the formation of pore free YAG materials ", Journal ofthe European Ceramic Society, 29, (2009), 317-322].Dry-pressing and isostatic cool pressing bonded method have advantages such as technology is simple, easy to operate.But for nanometer grade powder, because powder is superfine, intergranular friction power is bigger during dry-pressing, is difficult for compacting, causes sintering not fine and close.In addition, dry-pressing can only prepare the sample of simple shape such as some bulks, disk shape in conjunction with the method for isostatic cool pressing, can not prepare the complicated shape crystalline ceramics.
Especially, the doping that is used as the monocrystalline of transparent optical material usually all is even doping, can't realize having the grade doping of certain design.Studies show that the laser material of grade doping can dispel the heat better, helps improving its operating power when work.Yttria-base has high thermal, but its thermal conductivity significantly descends after mixing a small amount of ion.The yttria-base transparent ceramics of gradient design can make ceramic internal heat dissipating more convenient, helps improving the output rating of laser apparatus.Forming method based on present yttria-base transparent ceramics is single, shortcomings such as difficult preparation complicated shape and grade doping, and the someone proposes to utilize the flow casting molding method to prepare the yttria-base biscuit at present, prepares yttria-base transparent ceramics by unsticking and sintering.The method of usefulness organic radical curtain coatings such as Messing prepares the YAG crystalline ceramics, and is inflammable but organic solvent has, to human body work the mischief, shortcoming such as cost height.The sample of while flow casting molding, biscuit density is low, is difficult for densified sintering product.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, the preparation method of the programmable yttria-base transparent ceramics of a kind of The Nomenclature Composition and Structure of Complexes is provided.
The present invention utilizes water base or the organic radical solvent cast prepares the yttria-base film, increases the density of biscuit again by two inferior static pressure; Material design main contents comprise: at first adulterated powder and the dispersion agent with yttria-base powder, different amounts adds in the solvent, is mixed with the slurry with higher solids content, prepares cast film through mixing, remove steps such as bubble, curtain coating then; Wherein solvent both can adopt water basely, also can adopt organic radical.Casting films is carried out unsticking after according to design requirements lamination, isostatic cool pressing, through biscuit sintering in vacuum oven of isostatic cool pressing once more provide have specific characteristics can yttria-base transparent ceramics.Equipment mainly comprises ball mill, casting machine and vacuum sintering furnace.
The present invention adopts following technical scheme to solve the problems of the technologies described above:
The preparation method of the programmable yttria-base transparent ceramics of a kind of The Nomenclature Composition and Structure of Complexes comprises the steps:
1) yttrium oxide powder that will contain different doping contents is distinguished casting film-forming;
2) casting films that will have different doping contents is processed into different shapes according to demand, carries out lamination according to stack-design then;
3) casting films behind the lamination is carried out isostatic cool pressing and handle, after unsticking is handled, carry out isostatic cool pressing then once more and handle;
4) sample after the isostatic cool pressing processing is carried out vacuum sintering.
The implication of " different doping content " in the described step 1) is: the doped element in every kind of casting films is identical, the content difference of the doped element that just contains.
Preferable, the preparation method's of described yttria-base transparent ceramics concrete steps are:
1. yttrium oxide powder and adulterated powder are added in the solvent, add dispersion agent again,, be mixed with the slurry that solid content is 30～55vol% by ball mill mixing;
2. binding agent is added in the slurry that makes in the step 1), the binding agent add-on is 3～20wt% of the weight summation of yttrium oxide powder and adulterated powder;
3. once more behind the ball milling, casting film-forming on casting machine will be mixed with after the slurry deaeration of binding agent;
4. the casting films that will have different doping contents is processed into different shapes according to demand, carries out stack-design then according to demand;
5. the casting films behind the lamination is carried out the isostatic cool pressing processing, and forming pressure is 70～250Mpa;
6. the sample after the moulding is put into the retort furnace unsticking, heat-up rate is 1～5 ℃/minute, and the unsticking temperature is 500～700 ℃;
7. the sample after the unsticking carries out the isostatic cool pressing processing once more, and forming pressure is 70～250Mpa;
8. handle the back sample and put into vacuum oven, at 1700～1850 ℃ of sintering, vacuum tightness is 10
-2～10
-5Pa, sintering time are 4～30h.
Described " yttria-base transparent ceramics " is meant the doped with metal elements yttria-base transparent ceramics, and described doped element is selected from neodymium element (Nd), ytterbium element (Yb), holmium element (Ho), europium element (Eu), er element (Er) and the praseodymium element (Pr) one or more, in described " yttria-base transparent ceramics " inside, the ratio of doped element can be equally distributed, also can right and wrong equally distributed, can determine according to actual needs by those skilled in the art.
Preferable, described yttria-base transparent ceramics is: Nd doped yttrium oxide base transparent ceramic (Nd:Y
2O
3), Yb doped yttrium oxide base transparent ceramic (Yb:Y
2O
3), europium element (Eu) doped yttrium oxide base transparent ceramic (Eu:Y
2O
3), Ho doped yttrium oxide base transparent ceramic (Ho:Y
2O
3), Er doped yttrium oxide base transparent ceramic (Er:Y
2O
3), ytterbium element (Yb) and er element (Er) codoped yttria-base transparent ceramics (Yb, Er:Y
2O
3) and ytterbium element (Yb) and holmium element (Ho) codoped yttria-base transparent ceramics (Yb, Ho:Y
2O
3).
Preferable, the adulterated powder in the described step 1 is selected from one or more in Neodymium trioxide, ytterbium oxide, Holmium trioxide, europium sesquioxide, Erbium trioxide and the Praseodymium trioxide, and those skilled in the art can select according to the kind of concrete doped element.
Preferable, in the described step 1, the ratio between yttrium oxide powder and the adulterated powder can be determined according to doping ratio by those skilled in the art; Preferably, in the mole number sum of the mole number and the yttrium of doped element, the molar percentage of described doped element is 0.1～20at%, is preferably 0.4～8%.
Preferable, the solvent in the described step 1 is selected from: water, butanone or ethanol.
Preferable, the dispersion agent in the described step 1 is selected from: polyacrylic dispersion agent, polycarboxylic acid dispersion agent, polymethacrylic acid dispersion agent or dibutyl phthalate dispersion agent.
Preferably, the model of described polymethacrylic acid dispersion agent is CE64, and the model of described polycarboxylic acid dispersion agent is 731A, and the model of described dibutyl phthalate class organic dispersing agent is PE1168.
Preferably, the add-on of described solvent is 40～60wt% of the mixed powder gross weight of yttrium oxide powder and adulterated powder composition, and the add-on of described dispersion agent is 0.5～2.0wt% of the mixed powder gross weight of yttrium oxide powder and adulterated powder composition.
Preferable, the binding agent in the described step 2 is selected from: PVA binding agent, vinylbenzene binding agent or PVB binding agent.
Preferably, the model of described vinylbenzene binding agent is DM765.
Preferable, the ball milling time in described step 1 and the step 3 is 3～10 hours.
Deaeration in the described step 3 is handled can carry out deaeration according to prior art by those skilled in the art, also can use the deaeration machine to carry out deaeration and handle.
Preferable, the thickness of the casting films in the described step 4 is 0.1～2mm.
In the described step 4, the implication of " casting films that will have different doping contents is processed into different shapes " is: the concrete shape of the casting films of different doping contents can be circular, square or any needed shape.
In the described step 4, the implication of " carrying out stack-design as requested " is: according to the demand for grade doping, the casting films of different doping contents is superimposed layer by layer; In stacking process, can be that the top layer doping content is low, to increase to intermediate concentration the highest along with gradient, as: lamination doping content from top to bottom is followed successively by 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1% and 0%; Or minimum from a side concentration of lamination, with the opposite side concentration maximum of gradient to lamination, as: lamination doping content from top to bottom is followed successively by 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%; Also can be according to the variation of its concentration of Demand Design, as: lamination doping content from top to bottom is followed successively by 1.6%/0.8%/0%/0.4%/0.8%/1.2%/1.6%; Contained doped element kind is all identical in wherein synergetic each layer casting films.
Preferably, in the described step 5, before carrying out the isostatic cool pressing processing, the casting films behind the lamination need be coated, to prevent that when carrying out isostatic cool pressing, casting films is immersed in the liquid oils, is not polluted by liquid oils under condition of high voltage.Those skilled in the art can use materials such as plastic film or rubber to coat according to prior art.
The present invention prepares crystalline ceramics by utilizing water-based flow casting technique and organic radical casting technique, and the yttria-base powder preparing of different doping contents is become casting films, to satisfy the The Nomenclature Composition and Structure of Complexes design, the purpose of preparation crystalline ceramics.Preparation method of the present invention can prepare the special composition that monocrystal material can't be realized, also can obtain than dry-pressing formed more complicated shape simultaneously.
Description of drawings
Fig. 1 is the Yb/Y distribution diagram of element according to embodiment 1 stack-design.
Fig. 2 is the Yb/Y distribution diagram of element according to embodiment 2 stack-design.
Fig. 3 is according to the prepared casting films of embodiment 3.
Embodiment
Further describe technical scheme of the present invention below by specific embodiment.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.
With the mixed powder of 50g ytterbium oxide doped yttrium oxide base (in every batch, in the mole number sum of the mole number and the yttrium of ytterbium element, the volumetric molar concentration of ytterbium element is respectively: 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%) and 1g CE64 (polymethacrylic acid dispersion agent) add in the 10g water, ball milling 8h is mixed with the slurry that solid content is 47vol%.Add 6g DM765 (vinylbenzene binding agent) then, ball milling removed bubble after 3 hours, and casting film-forming, the thickness of casting films are 0.8mm.
The casting films of different content is processed into rectangle, and (width is 3cm, length is 4cm), the casting films that will contain different levels of doping then, be followed successively by 0%/1%/2%/3%/4%/5%/6%/7%/8%/7%/6%/5%/4%/3%/2%/1%/0% design according to the doping content of every layer of casting films from top to bottom, in layer stack up.With the isostatic cool pressing under 200MPa pressure of the sample behind the lamination, in retort furnace, be heated to 600 ℃ of insulations with 1 ℃/minute speed then and carried out unsticking in one hour.Sample is once more with 200MPa pressure isostatic cool pressing after the unsticking, sintered sample in vacuum oven at last, and vacuum tightness is 10
-5Pa, sintering temperature is 1700 ℃, sintering time is 5h.
The element of sample distributes as shown in Figure 1 behind the sintering, Elements Diffusion during owing to sintering, and the middle doping content of sample is the highest behind the sintering, reduces gradually to both sides equably.Among Fig. 1, X-coordinate is represented the thickness of pottery, and ordinate zou is represented concentration of element, and the unit of ordinate zou is element-intensities, and expression ytterbium element is with the content of ceramic thickness among Figure 1A, and the expression yttrium is with the content of ceramic thickness among Figure 1B.
With the mixed powder of 55g ytterbium oxide doped yttrium oxide base (in every batch, mole number sum in the mole number and the yttrium of ytterbium element, the volumetric molar concentration of ytterbium element is respectively: 0%, 2%, 4%, 6%, 8%) and 0.8g 731A (polycarboxylic acid dispersion agent) add in the 10g water, ball milling 10h is configured to the slurry that the volume solid content is 49vol%.Add logical worker's 4700 emulsions (binding agent) of foreignizing of 10g then, ball milling removed bubble after 3 hours, and casting film-forming, the thickness of casting films are 1mm.
The casting films of different content is processed into rectangle, and (width is 3cm, length is 4cm), the casting films that will contain different levels of doping then, be followed successively by 0%/2%/4%/6%/8%/6%/4%/2%/0% design according to the doping content of every layer of casting films from top to bottom, in layer stack up.With the isostatic cool pressing under 250Mpa pressure of the sample behind the lamination, in retort furnace, be heated to 700 ℃ of insulations with 5 ℃/minute speed then and carried out unsticking in one hour.Sample is once more with 200MPa pressure isostatic cool pressing after the unsticking, sintered sample in vacuum oven at last, and sintering temperature is 1850 ℃, vacuum tightness is 10
-2Pa, sintering time are 30h.
The element of sample distributes as shown in Figure 2 behind the sintering, Elements Diffusion during owing to sintering, and the middle doping content of sample is the highest behind the sintering, reduce gradually to both sides equably, because the content difference between the lamination is big (2%), element has little time diffusion, and the element in the accompanying drawing 2 distributes and has jump trend.Among Fig. 2, X-coordinate is represented the thickness of pottery, and ordinate zou is represented concentration of element, and the unit of ordinate zou is element-intensities, and expression ytterbium element is with the content of ceramic thickness among Fig. 2 A, and the expression yttrium is with the content of ceramic thickness among Fig. 2 B.
With the mixed powder of 35g Neodymium trioxide doped yttrium oxide base (in every batch, in the mole number sum of the mole number and the yttrium of neodymium element, the volumetric molar concentration of neodymium element is respectively 0%, 0.4%, 0.8%, 1.2%, 1.6%) and 0.7g PE1168 (dibutyl phthalate class organic dispersing agent) add in the 8g butanone alcohol mixed solution (3: 1) ball milling 10h, add 5gPVB (organic binder bond) then, behind the ball milling 3 hours, casting film-forming, the thickness of casting films are 0.4mm.
The casting films of different content is processed into rectangle (width is 2cm, and length is 6cm), carries out lamination according to 0%/1.6%/0.8%/0%/0.4%/0.8%/1.2%/1.6%/0% design then.With the isostatic cool pressing under 150MPa pressure of the sample behind the lamination, in retort furnace, be heated to 600 ℃ of insulations with 2 ℃/minute speed then and carried out unsticking in one hour.Sample is once more with 200MPa pressure isostatic cool pressing after the unsticking, sintered sample in vacuum oven at last, and sintering temperature is 1800 ℃, vacuum tightness is 10
-5Pa, sintering time are 4h.Prepared casting films as shown in Figure 3, this film has certain toughness and intensity, can arbitrarily fold.
Embodiment 4
(in every batch, in the mole number sum of the mole number and the yttrium of europium element, the volumetric molar concentration of europium element is respectively: 0% with the mixed powder of 50g europium sesquioxide doped yttrium oxide base, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, the implication of above-mentioned per-cent is: in the gross weight of mixed powder, the weight percent of europium oxide powder) and 1g polyacrylic dispersion agent add in the 10g butanone, ball milling 3h is mixed with the slurry that solid content is 30vol%.Add 1.5g PVA binding agent then, ball milling removed bubble after 10 hours, and casting film-forming, the thickness of casting films are 0.3mm.
The casting films of different content is processed into rectangle, and (width is 1cm, length is 5cm), the casting films that will contain different levels of doping then, be followed successively by 0%/1%/2%/3%/4%/5%/6%/7%/8%/7%/6%/5%/4%/3%/2%/1%/0% design according to the doping content of every layer of casting films from top to bottom, in layer stack up.With the isostatic cool pressing under 70MPa pressure of the sample behind the lamination, in retort furnace, be heated to 500 ℃ of insulations with 5 ℃/minute speed then and carried out unsticking in one hour.Sample is once more with 250MPa pressure isostatic cool pressing after the unsticking, sintered sample in vacuum oven at last, and sintering temperature is 1850 ℃, vacuum tightness is 10
-5Pa, sintering time are 30h.
(in every batch, in the mole number sum of the mole number and the yttrium of er element, the volumetric molar concentration of er element is respectively: 0% with the mixed powder of 50g Erbium trioxide doped yttrium oxide base, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, the implication of above-mentioned per-cent is: in the gross weight of mixed powder, the weight percent of Erbium trioxide powder) and 1g polyacrylic dispersion agent add in the 10g butanone, ball milling 10h is mixed with the slurry that solid content is 30vol%.Add 6g PVA binding agent then, ball milling removed bubble after 3 hours, and casting film-forming, the thickness of casting films are 1.5cm.
The casting films of different content is processed into rectangle, and (width is 2cm, length is 3cm), the casting films that will contain different levels of doping then, be followed successively by 0%/1%/2%/3%/4%/5%/6%/7%/8%/7%/6%/5%/4%/3%/2%/1%/0% design according to the doping content of every layer of casting films from top to bottom, in layer stack up.With the isostatic cool pressing under 250MPa pressure of the sample behind the lamination, in retort furnace, be heated to 700 ℃ of insulations with 1 ℃/minute speed then and carried out unsticking in one hour.Sample is once more with 250MPa pressure isostatic cool pressing after the unsticking, sintered sample in vacuum oven at last, and sintering temperature is 1750 ℃, vacuum tightness is 10
-5Pa, sintering time are 4h.
(in every batch, the doping molar percentage concentration of ytterbium element is respectively 1%, 2% with the mixed powder of 50g ytterbium oxide and Erbium trioxide codoped yttria-base, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, the implication of above-mentioned per-cent is: in the mole number sum of yttrium, ytterbium element and er element, the molar percentage of ytterbium element; In every batch, the doping molar percentage concentration of er element is respectively 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, the implication of above-mentioned per-cent is: in the mole number sum of yttrium, ytterbium element and er element, the molar percentage of er element) and 0.25gPE1168 type dibutyl phthalate class organic dispersing agent join in the 30g ethanol, ball milling 3h is mixed with the slurry that solid content is 30vol%.Add 1.5g PVA binding agent then, ball milling removed bubble after 3 hours, and casting film-forming, the thickness of casting films are 0.1cm.
The casting films of different content is processed into rectangle, and (width is 2cm, length is 3cm), the casting films that will contain different levels of doping then, be followed successively by 2%/4%/6%/8%/10%/12%/14%/16%/18%/20% design according to total doping content of every layer of casting films (the molar percentage sum of ytterbium element and er element) from top to bottom, in layer stack up.With the isostatic cool pressing under 250MPa pressure of the sample behind the lamination, in retort furnace, be heated to 700 ℃ of insulations with 1 ℃/minute speed then and carried out unsticking in one hour.Sample is once more with 250MPa pressure isostatic cool pressing after the unsticking, sintered sample in vacuum oven at last, and sintering temperature is 1750 ℃, vacuum tightness is 10
-5Pa, sintering time are 4h.
With the mixed powder of 50g ytterbium oxide, Holmium trioxide and yttrium oxide (in every batch, the doping molar percentage concentration of ytterbium element is respectively 0.2%, 0.4%, 0.6%, 0.8%, 1%, the implication of above-mentioned per-cent is: in the mole number sum of yttrium, ytterbium element and holmium element, the molar percentage of ytterbium element; In every batch, the doping molar percentage concentration of holmium element is respectively 0.2%, 0.4%, 0.6%, 0.8%, 1%, the implication of above-mentioned per-cent is: in the mole number sum of yttrium, ytterbium element and holmium element, the molar percentage of holmium element) and 1g PE1168 type dibutyl phthalate class organic dispersing agent join in the 20g butanone, ball milling 5h is mixed with the slurry that solid content is 55vol%.Add 1.5g P VA binding agent then, ball milling removed bubble after 3 hours, and casting film-forming, the thickness of casting films are 2cm.
The casting films of different content is processed into rectangle, and (width is 2cm, length is 3cm), the casting films that will contain different levels of doping then, be followed successively by 0.4%/0.8%/1.2%/1.6%/2% design according to total doping content of every layer of casting films (the molar percentage sum of ytterbium element and holmium element) from top to bottom, in layer stack up.With the isostatic cool pressing under 250MPa pressure of the sample behind the lamination, in retort furnace, be heated to 700 ℃ of insulations with 1 ℃/minute speed then and carried out unsticking in one hour.Sample is once more with 250MPa pressure isostatic cool pressing after the unsticking, sintered sample in vacuum oven at last, and sintering temperature is 1850 ℃, vacuum tightness is 10
-5Pa, sintering time are 30h.
Claims (10)
1. the preparation method of the programmable yttria-base transparent ceramics of The Nomenclature Composition and Structure of Complexes comprises the steps:
1) yttrium oxide powder that will contain different doping contents is distinguished casting film-forming;
2) casting films that will have different doping contents is processed into different shapes according to demand, carries out lamination according to stack-design then;
3) casting films behind the lamination is carried out isostatic cool pressing and handle, after unsticking is handled, carry out isostatic cool pressing then once more and handle;
4) sample after the isostatic cool pressing processing is carried out vacuum sintering.
2. the preparation method of the programmable yttria-base transparent ceramics of The Nomenclature Composition and Structure of Complexes described in claim 1, it is characterized in that, in the described yttria-base transparent ceramics, in the mole number sum of the mole number and the yttrium of doped element, the molar percentage of described doped element is 0.1～20at%.
3. the preparation method of the programmable yttria-base transparent ceramics of The Nomenclature Composition and Structure of Complexes described in claim 1 is characterized in that, the casting film-forming in the described step 1) comprises following concrete steps:
A, yttria-base powder and adulterated powder are added in the solvent, add dispersion agent again, make the slurry that solid content is 30～55vol% behind the batch mixing;
B, binding agent is added in the slurry that makes in the step 1), the binding agent add-on is 3～20wt% of yttrium oxide powder and adulterated powder gross weight;
C, once more behind the ball milling, casting film-forming on casting machine will be mixed with after the slurry deaeration of binding agent.
4. the preparation method of the programmable yttria-base transparent ceramics of The Nomenclature Composition and Structure of Complexes described in claim 3, it is characterized in that the adulterated powder in the described steps A is selected from one or more in Neodymium trioxide, ytterbium oxide, Holmium trioxide, europium sesquioxide, Erbium trioxide and the Praseodymium trioxide.
5. the preparation method of the programmable yttria-base transparent ceramics of The Nomenclature Composition and Structure of Complexes described in claim 3 is characterized in that, the solvent in the described steps A is selected from: water, butanone or alcohol.
6. the preparation method of the programmable yttria-base transparent ceramics of The Nomenclature Composition and Structure of Complexes described in claim 3, it is characterized in that the dispersion agent in the described steps A is selected from: polyacrylic dispersion agent, polycarboxylic acid dispersion agent, polymethacrylic acid dispersion agent or dibutyl phthalate dispersion agent.
7. the preparation method of the programmable yttria-base transparent ceramics of The Nomenclature Composition and Structure of Complexes described in claim 1 is characterized in that, the forming pressure of the isostatic cool pressing in the described step 3) is 70～250Mpa.
8. the preparation method of the programmable yttria-base transparent ceramics of The Nomenclature Composition and Structure of Complexes described in claim 1, it is characterized in that, the concrete steps that the unsticking of described step 3) is handled are: the sample after the moulding is put into the retort furnace unsticking, heat-up rate is 1～5 ℃/minute, and the unsticking temperature is 500～700 ℃.
9. the preparation method of the programmable yttria-base transparent ceramics of The Nomenclature Composition and Structure of Complexes described in claim 1, it is characterized in that, the concrete steps of the vacuum sintering of described step 4) are: handle the back sample and put into vacuum oven, at 1700～1850 ℃ of sintering, vacuum tightness is 10
-2～10
-5Pa, sintering time are 4～30h.
10. a yttrium oxide base transparent ceramic is made by the preparation method described in the claim 1～9.
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